I helped my two brothers in 2013 and 2014 on Wasatch for hunts. I helped a friend on the Manti in 2015.
I think the overall elk herd on the Manti is in better shape. We saw more total elk on the Manti than either year on the Wasatch. Bull quality overall was better on Manti 2015 than Wasatch 2013. But Wasatch 2014 was just as good as Manti 2015.
Having seen what I saw the last 3 years, I'd give a slight edge to the Manti. The future is a little uncertain on the Wasatch. But I think the present is still pretty decent for quality bulls.